Better to wait before dirtying again

[redgeoff]

At

spiegel/src/replicators.js

Line 155 in 57a1d09

return this.dirtyIfCleanOrLocked(conflictedDBNames)

(and the similar code for the change-listener) it would probably be better to say wait a random amount from 1 to 1,000 ms before dirtying again in the event that there are conflicts. This should cut down on two update-listeners attempting to dirty the same items repeatedly.